Make the failure example with strict=True in scan() docs a code-block instead of…

Make the failure example with strict=True in scan() docs a code-block instead of test-code. This way the tests would not expect the broken code to actually work.

Make the failure example with strict=True in scan() docs a code-block instead of…
6c5be10e · Anton Chechetka · 5a7351f6 · 6c5be10e
--- a/doc/library/scan.txt
+++ b/doc/library/scan.txt
@@ -390,7 +390,7 @@ ensured by the user. Otherwise, it will result in an error.
 Using the original Gibbs sampling example, with ``strict=True`` added to the
 ``scan()`` call:

-.. testcode:: scan_strict
+.. code-block:: python

    # Same OneStep as in original example.
    def OneStep(vsample) :